Sydney has emerged as an economic powerhouse but rapid population growth and sweeping technological changes have left the city vulnerable to complex threats. A risk assessment has for the first time identified the eight shocks most likely to paralyse the city.
Matt Wade reports

As Sydney gets bigger and more densely populated it is also gets much richer. But there's a catch – new research shows a disproportionate share of the wealth is going to top income earners as Australia's major cities grow and that is breeding greater inequality.